well...nolva doesn't do much for the water. if you're trying to keep water and gyno away...then go with femera, aromasin or arimidex.
though...if you were to take nolva for the duration of a cycle, which i have done, 10 to 20 mg's/day. if you already have gyno and are trying to fight it...thats when you go with higher doses.
i ran 20mg/day nolva with an omnadren cycle...no gyno but kept a lot of water on.